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Individual Calculations February 2023 |
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| Hofstee, Piet Total change: -15.20 | |   |
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| Chessfestival Groningen 2022 Compact | Groningen | NED | 2022-12-26 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1608 | 1636 | 1.50 | 3 | -0.11 | 20 | -2.20 | |
|  Westerhof, Fleur | | | 1553 | NED | 1.00 | 1 | 0.39 | 20 | 7.80 | |  Boer, Jan | | | 1666 | NED | 0.50 | 1 | 0.04 | 20 | 0.80 | | | Riedstra, Symon | | | 1606 | NED | 0.00 | 1 | -0.54 | 20 | -10.80 | |
Rc - average rating of rated opponents, Ro - rating of a player in a tournament, Rp - rating performance of an unrated player, W - points won in a tournament against rated opponents, N - total number of games against rated opponents, Change - change used for calculation according to formula, K - development coefficient, Kchg - rating change of a player calculated as (K * change) | | | | Tata Steel dagvierkampen 2023 | Wijk aan Zee | NED | 2023-01-16 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1363 | 1634 | 1.00 | 2 | -0.65 | 20 | -13.00 | |
| | De Haas, Paul | | | 1404 | NED | 0.00 | 1 | -0.79 | 20 | -15.80 | | | Van Veen, Robert | | | 1322 | NED | 1.00 | 1 | 0.14 | 20 | 2.80 | |
Rc - average rating of rated opponents, Ro - rating of a player in a tournament, Rp - rating performance of an unrated player, W - points won in a tournament against rated opponents, N - total number of games against rated opponents, Change - change used for calculation according to formula, K - development coefficient, Kchg - rating change of a player calculated as (K * change) | | |
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